StarTech.com Extreme Networks 10057 Compatible SFP Module, 1000BASE-BX-U, 1 Gigabit Ethernet Bi-Directional (BiDi) Fiber Single Strand SFP (SMF), LC 10km, Mini GBIC Transceiver SFP Module - Lifetime Warranty (10057-ST) - SFP (mini-GBIC) transceivermodul - 1GbE